Air-gun barrel and method of forming the same.



C. F. LEFEVER. AIR GUN BARREL AND METHOD OF FORMING THE SAME.

APPLICATION FILED DEC.27| I915.

Patented Apr. 25, 1916.

{72nd es [Zefarzr l n y a a 9.11 cylinder 1s ing together the butting edges. So

welded or soldered tubing, necessitated by the fact that the false barrelis not air-tight and cannot ..melting point CHARLES 1E. LEIIEEVER, 01E PLYMOUTH, MICHIGAN, ASSIGNOR TO DAISY MANUFAC- rnnnve conrm, or rLYMoU'rH, MICHIGAN, A co PORATION OF MICHIGAN.

AIR-GUN BARREL AND METHOD OF FORMING- THE SAME.

To all whom it may concern:

Be it known that 1, CHARLES F. LEFEVER, a d izen of the United States of America, reslding at Plymouth, in thecounty, of Wayne and State of Michigan, have in vented certain new and useful Improvements in Air-Gun Barrels and Methods of Forming the Same, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to the manufacture of air guns, and it is the object of the invention to simplify the construction and reduce the, costof manufacture.

In the present state of the art it is usual to provide air guns with a false barrel formed of a sheet-metal blank with butted within-this false barformed of seamless and this inner edges, and to arrange rel an air cylinder or -welddering is not permissible for the reason that in forming an oxidized finish on the barrel it is heated to a higher temperature than the of the solder. On the other hand, welding of the barrel is an expensive operation. r Y

With the present invention ll have avoided the necessity of a separate air cylinder without either the use ieii -solder or forming the entire false barrel'of tubing. This is accomplished by forming thebarrel from a sheet-metal blank having butting edges for length, but provided with a welded seam for a short portion t o produce an air-tight cylinder. i v

lln'the drawings:'lFigure 1 is- ..fayplan of be made air-tight without solderin l the blank from which my tube is formed; Fig. 2 is an enlarged cross'section of the formed. tube, howing A through the Fig t'is an rel; and Fig.

i with the barrel the. portion having butted edges; Fig. 3 1s a similar view Specification of Letters Patent.

portion seamless or welded the greater portion of its welded portion of the ti1loe5' j projecting beyond .corresp ndm suitable for v Patented Apr. 25, 191%.

Application filed. December 27, 1915. Serial No. 68,715.

B is a portion of the barrel suit-ably cutaway and fashioned for the formation of the engagement means with the'stock and of the mechanism. C is a portion at the opposite end of the blank, and D is an intermediate portion suitably positioned for the air cylinder. The edges of the portion C are preferably straight and adapted to be butted against each other, as shown in Fig. 2, but the edges of the portion D are preferably fashioned to form an overlapping joint. Preferably one of the edges F of the portion D projects beyond the line of the edge of the portion A and is beveled, while the opposite edge G is reversely beveled to receive said projecting portion.

The blank formed as described is bent into a cylinder with the edges of the portionA abutting, while the projecting beveled edge F of the portion D overlaps the reversely lapping edges are then welded,-preferably electrically, and will thus form a flush joint both inside and outside the barrel.

With a barrel constructed as the welded section will form an air-tight cylinder, which is as serviceable asa seamless tube, the barrel have merely butted edges. 1 length of the welded portion is r latively slight in comparison with the entire" length of the barrel, and consequently a considerable saving in cost is eflected over a conbeveled edge thereof. These over-- described,

while the remaining portiens of.

The

1. The method of forming gun barrels,

comprisin the cutting of a blank with a portion 0 .its length ting the edges thereof and another portion fashioned to overlap, forming said blank fashioned for abutinto acylinder and welding the overlapping portions. 7

2. They method of forming gun barrels,

of a blank with an 1 comprising the cutting edge thereof for a portion of the length tion, forming said blank int-o a cylindrical overlapping and the other edges abutting,

and ielding the overlapping edges.

its length formed with the edge of another porbarrel with the projecting edge portions I gun-barrel, comprising a continuous barrel formed of a single sheet-metal blank having a portion of butting edges and another portion with.

overlapping and welded edge portions forming flush surfaces.

4:. The method of forming gun barrels,

comprising cutting of a blank with an edge thereof'for a portlon of the length projecting beyond the edge of another portion, said projecting edge being beveled and the Y opposite edge of the blank being reversely beveled, forming said blank into a. cylindrical barrel with the beveled portions overand welding the overlapping porppi g, tions.

5. A 'gun barrel, comprising a continuous barrel formed of a single sheet metal blank 5 having a portion of its length formed with butting edges and another portion with overlapping beveled edges welded together to form flush outer. and inner surfaces.

In testimony whereof I aflix my signature 0 in presence of two witnesses.

I CHARLES F. LEFEVER. Witnesses: JAMES- P. BARRY,

' PHYLLIS COBURN. 

